The better earthing system the better protection for your equipment

Hello. 3 weeks ago this boy from technician from LDS International call me asking about DVR. He wanted to know which brand is better. And i ask him why you want to buy expensive DVR? He told me that their dvr always damaged when struck by lightning. So i advised him to check their building earthing system first. And surprisely they found out all the copper tape located at the top and the side have gone missing.